| Author |
Message |
    
taterhead
| | Posted on Monday, February 25, 2002 - 2:51 pm: | 
|
Has anyone heard of this mod> What you do is as follows
clip r238 on one side then add a 1n4001 to cut side of r238 band toward board solder in place.
It is supposed to allow you to turn down deadkey and when you talk allows the radio to swing to max. |
Jpatt24
| | Posted on Wednesday, February 27, 2002 - 12:20 am: |
|
yes it works, as i have done the same mod to a melaka base before. |
radiodude
| | Posted on Wednesday, February 27, 2002 - 8:45 pm: |
|
OK thanks and I will do it as soon as I find the parts and I get time. |
Lrinaldi
| | Posted on Monday, April 15, 2002 - 4:52 pm: |
|
what is a 4001 please tell me how it works 719 larry |
Jpatt24
| | Posted on Sunday, April 21, 2002 - 6:00 pm: |
|
the 1n4001 is a diode that can be found at any radio shack. the mod will allow you to turn the dead key as low as you want and still swing the full wattage of the radio. |
bruce
| | Posted on Sunday, April 21, 2002 - 9:47 pm: |
|
The 1n4001 is a ruggid silcon diode if i remember it is rated at 100v piv and 1 amp. As a bias diode it is probley foward biased which would allow a .7 volt higher bias point allowing the the control a wider range than if it ( the transistor ) had been tied to ground ...... ive seen this done although im sumising from what you are saying this is how it is being used. Jpatt24 is correct try rad-shack |
Taz
| | Posted on Sunday, June 02, 2002 - 3:30 pm: |
|
Is this in anyway hard on the radio?
So all I do is clip r238 and solder a 1n4001 in place? |
Taz
| | Posted on Monday, June 03, 2002 - 6:18 pm: |
|
? |
Taz
| | Posted on Tuesday, June 04, 2002 - 7:59 pm: |
|
I have heard it uses extra voltege to drive it and can be a little hard on it. |
Taz
| | Posted on Thursday, June 13, 2002 - 8:29 pm: |
|
? I guess not |
Taz
| | Posted on Tuesday, June 18, 2002 - 4:43 am: |
|
Radioshack discontinued their diodes! |
Honkytonkman593
| | Posted on Tuesday, June 18, 2002 - 6:26 pm: |
|
whatcha nean they discontinued their diodes? what they getting out of the electonic biz or what. been awhile since i been there. taz is does put a strain on the parts but itll last for a long time. or you can upgrade parts for lesse then 20$ and last forever. i have this done on my 2 bases and all of my mobiles. it works and i like it!! |
Taz
| | Posted on Tuesday, June 18, 2002 - 11:11 pm: |
|
how long is a long time? |
Taz
| | Posted on Tuesday, June 18, 2002 - 11:11 pm: |
|
they dont sell diodes anymore. |
Taz
| | Posted on Monday, July 01, 2002 - 6:29 pm: |
|
ok, well
i went to a place here locally and they found the part but they cross-referenced it to another item
NTE-116
Made by NTL Electronics.
On the package it says
Prv - 600V Max Ifsm - 30A
If - 1A Max Vf- 11.v @ 1A
It says it replaces the ECG116, GE-504A and the SK3313
will it work? he said the company that made the other part 1N4001 went out of business and these guys took over. |
Taz
| | Posted on Monday, July 01, 2002 - 6:33 pm: |
|
also by going to http://nte01.nteinc.com/nte/NTExRefSemiProd.nsf/$$Search?OpenForm
you can cross reference parts and thats a match. any opinions before it attempt this?
|
Taz
| | Posted on Monday, July 01, 2002 - 6:50 pm: |
|
how will the deadkey be controlled? will it swing more? |
d104 Ohio
| | Posted on Sunday, July 28, 2002 - 2:12 pm: |
|
First of all, R-238 will be right infront of the AM high power VR, one leg will be in the air. Clip that leg directly in the middle. Place the 1N4001 Diode with the BANDED side toward the board, if you don't, you will have no power at all. Once you have, check this out and see that it works, set your dead key from 2-4 watts so you won't be too hard on the parts. Or add a variable power so you can adjust it to your liking at any time! This modification can be done to the Melaka and any other Galaxy DX radio with the EPT3600 board. (exmples: DX33-99!) |
Taz
| | Posted on Sunday, July 28, 2002 - 8:36 pm: |
|
thanks for clarifying |
Taz
| | Posted on Sunday, July 28, 2002 - 8:43 pm: |
|
does anyone else have an opinion on this mod? i dont know if its good or bad? |
Taz
| | Posted on Sunday, July 28, 2002 - 8:44 pm: |
|
what should the melaka swing afterwords? |
radiodude
| | Posted on Monday, July 29, 2002 - 12:32 am: |
|
Well Taz
I did the mod to my Melaka, and If you have var pwr turn it down to about 2w and the radio will swing to max. Mine will swing from 2 to 50 |
d104 Ohio
| | Posted on Monday, July 29, 2002 - 2:28 am: |
|
If you cut the mod limiter (R249), it will probably swing to 18-25 PEP after an alignment, if you just turn the modulation adjustment all the way up, it'll swing about 15-18 watts PEP. These figures may vary depending on your meters though. The last Melaka I had was clipped and did about 24 watts PEP... I tested it on a 300 watt MFJ dummy load, 27.2150 Mhz, on three sets of meters... the average was 24 watts! |
d104 Ohio
| | Posted on Monday, July 29, 2002 - 2:12 pm: |
|
I think Radiodude had to add another final transistor to obtain 50 watts... probably added 13.8 volts to the middle test point on the mirror board too! This mod is rather easy too... there is already a place to add another final, just find the support parts and you can do it! You can use a 2SC1969 or 2SC2312 for the second final. |
Taz
| | Posted on Monday, July 29, 2002 - 3:11 pm: |
|
ok, was that with a whistle? or by saying auuuuddiiiiiooo |
Taz
| | Posted on Monday, July 29, 2002 - 7:46 pm: |
|
hey radiodude, did you do the writeup on the mod for the 2nd final yet? |
Taz
| | Posted on Monday, July 29, 2002 - 7:53 pm: |
|
so let me see if i understand this right.
clip r-238 completly out and put in the 1n4001 in its place? or snip r-238 and put it between the 2 snipped ends? |
Capncrunch
| | Posted on Monday, July 29, 2002 - 9:13 pm: |
|
taz leave the resistor and add the diode in line with it banded end toward the board works pretty well on my rci2950,3300hp and dx99
good luck
capncrunch |
d104 Ohio
| | Posted on Monday, July 29, 2002 - 9:29 pm: |
|
Put it between the two snipped ends. And that was an audiooooo, not a whistle, I never whistle into my radios! They give you false readings, just because it shows you 25 watts with a whistle, doesn't mean you are doing 25 watts when you talk! |
Taz
| | Posted on Monday, July 29, 2002 - 10:22 pm: |
|
I know d104 thats why I asked 
What do you have your carrier set at with this mod? Whats a good place to set it? |
Taz
| | Posted on Monday, July 29, 2002 - 10:24 pm: |
|
and one more thing, will a 2 watt carrier and the output that the melaka will do after this mod be to hard on the klv-550? |
radiodude
| | Posted on Monday, July 29, 2002 - 10:39 pm: |
|
Working on the write up. I want to make it as easy as possible.
I work 10-12hrs a day at Lowes so I will do it my next day off. |
d104 Ohio
| | Posted on Monday, July 29, 2002 - 11:58 pm: |
|
Set your carrier to 2-4 watts, wherever you like it best in that range... the klv550 can handle it easy! You could add a 500k ohm pot on the back of your radio and solder it in place of your AM carrier adjustment... then you can set it to 4 watts barefoot, then 1-3 watts with your linear on! |
Taz
| | Posted on Monday, July 29, 2002 - 11:39 pm: |
|
cool radiodude. Well I did that mod and it honestly didnt work any differently, all i was told is it was overmodulated so i put it back the way it was. |
radiodude
| | Posted on Tuesday, July 30, 2002 - 8:07 am: |
|
TAZ,
When you do the swing mod you may need to turn your mic gain down. I had to on mine |
radiodude
| | Posted on Tuesday, July 30, 2002 - 9:56 am: |
|
here is the inside of my Melaka \image |
radiodude
| | Posted on Tuesday, July 30, 2002 - 9:57 am: |
|
Heck no pic went in SORRY!!
Forummaster Note : You must use your name and password to post images.
|
Taz
| | Posted on Tuesday, July 30, 2002 - 3:55 pm: |
|
\ image{Text description}
its like that except no space between the backslach and the letter I |
rice1030@fuse.net
| | Posted on Tuesday, July 30, 2002 - 11:55 pm: |
|
Ok i got it but I have to reduce file size
Forummaster Note : If you will email them to me I will post them for you.
|
Taz
| | Posted on Wednesday, July 31, 2002 - 12:08 am: |
|
whats the image upload limit for the moderators? |
Radiodude
| | Posted on Wednesday, July 31, 2002 - 12:12 am: |
|
I sent the pic to the fourmaster
Thanks all |
Forummaster
| | Posted on Wednesday, July 31, 2002 - 8:12 pm: |
|
Radiodude,
I haven't received any pics from you. I noticed in the message above that you misspelled forummaster that might be why I didn't receive them. Send them to :
forummaster@copperelectronics.com |
Taz
| | Posted on Wednesday, July 31, 2002 - 9:03 pm: |
|
Did he mean floormaster? |
radiodude
| | Posted on Wednesday, July 31, 2002 - 11:14 pm: |
|
flourmaster fourmaster fortmaster portmaster
fourmmaster there got it lol |
Taz
| | Posted on Thursday, August 01, 2002 - 2:18 am: |
|
actually you didnt.
its
forummaster
you said
fourmmaster |
radiodude
| | Posted on Thursday, August 01, 2002 - 9:51 pm: |
|
Taz
got you!!!! ha ha I just wanted to see if anyone caught it!!!! |
